// 实例化高德地图
var gaodeMapLayer = new ol.layer.Tile({
  title: '高德地图',
  source: new ol.source.XYZ({
    url: 'http://wprd0{1-4}.is.autonavi.com/appmaptile?lang=zh_cn&size=1&style=7&x={x}&y={y}&z={z}',
    wrapX: false,
    crossOrigin: 'Anonymous',
  }),
});
